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Finding the Fourth Proportional to 7,942.20, 11,909.70 and 3,010.20

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Solution

The fourth proportional to 7,942.20, 11,909.70 and 3,010.20 is: 4,513.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,942.20 : 11,909.70 = 3,010.20 : x
  2. Step 2: Convert to fraction form
    7,942.20/11,909.70 = 3,010.20/x
  3. Step 3: Cross multiply
    7,942.20x = 11,909.70 × 3,010.20
  4. Step 4: Simplify right side
    7,942.20x = 35,850,578.94
  5. Step 5: Solve for x
    x = 35,850,578.94/7,942.20
  6. Step 6: Final answer
    x = 4,513.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.